Lens



FIG. 1 is a bottom perspective view of a first embodiment of theornamental design for a lens.

FIG. 2 is a top view of the first embodiment.

FIG. 3 is a bottom view of a second embodiment of the ornamental designfor a lens.

FIG. 4 is a front view of the first embodiment.

FIG. 5 is a back view of the first embodiment, the back view of thesecond embodiment being the same.

FIG. 6 is a right view of the first embodiment.

FIG. 7 is a left view of the first embodiment.

FIG. 8 is a front view of the second embodiment.

FIG. 9 is a top-view of the second embodiment.

FIG. 10 is a right view of the second embodiment; and,

FIG. 11 is a left view of the embodiment.

The broken-line disclosure in the views is understood to representportions of the article in which the claimed design is embodied, butwhich form no part of the claimed design.

CLAIM The ornamental design for a lens, as shown and described.